Apply a wielded bullwhip with fire-command

include/extern.h

@@ -52,6 +52,7 @@ extern boolean catch_lit(struct obj *);
 extern void use_unicorn_horn(struct obj **);
 extern boolean tinnable(struct obj *);
 extern void reset_trapset(void);
+extern int use_whip(struct obj *);
 extern int use_pole(struct obj *, boolean);
 extern void fig_transform(union any *, long);
 extern int unfixable_trouble_count(boolean);

src/apply.c

@@ -28,7 +28,6 @@ static void use_trap(struct obj *);
 static int touchstone_ok(struct obj *);
 static void use_stone(struct obj *);
 static int set_trap(void); /* occupation callback */
-static int use_whip(struct obj *);
 static void display_polearm_positions(int);
 static int use_cream_pie(struct obj *);
 static int jelly_ok(struct obj *);
@@ -2689,7 +2688,7 @@ set_trap(void)
     return 0;
 }
 
-static int
+int
 use_whip(struct obj *obj)
 {
     char buf[BUFSZ];

src/dothrow.c

@@ -451,6 +451,9 @@ dofire(void)
                 /* if we're wielding a polearm, apply it */
                 if (uwep && is_pole(uwep))
                     return use_pole(uwep, TRUE);
+                /* if we're wielding a bullwhip, apply it */
+                else if (uwep && uwep->otyp == BULLWHIP)
+                    return use_whip(uwep);
                 else if (iflags.fireassist
                          && uswapwep && is_pole(uswapwep)
                          && !(uswapwep->cursed && uswapwep->bknown)) {